NATURAL SCIENCES OF PHILADELPHIA. 357 



tica oblouga nigris, abdomine rufo, segmentis duobus primis fuscis apice rufis. 

 Long. -37. 



Bitter Root Valley, Mr. Ulke. The large spot of the elytra extends two- 

 thirds the length ; its anterior outline is angulated at the suture, and slightly 

 concave each side ; the lateral outline is straight, and reaches the apex, 

 which is abruptly rounded ; the suture is retracted and presents a small tooth. 



95. Clytus mormonus, niger, parce cinereo-pubescens, capite scabro, 

 carinis duabus frontalibus notato, thorace ovali latitudine longiore, convexo, 

 scabro, elytris subtilius punctatis et rugosis, apice singulatim rotundatis, 

 guttis pluribus parvis cinereo-pubescentibus in fascia ad medium alteraque ad 

 dodrantem digestis ; femoribus posticis abdomine paulo brevioribus. Long. -60. 



Utah, Mr. E. T. Cresson. The specimen before me has lost nearly all the 

 pubescence, but the species can be readily recognized by the characters above 

 given. The thorax is regularly oval, equally narrowed at base and apex, 

 densely rugosely punctured, without any elevations. 



96. Callidium (Phymatodes) Agassii, robustum, atrum opacum, thorace 

 rude punctato, transverso, lateribus valde rotundatis, elytris basi truncatis, 

 thorace latioribus, ante medium rude, pone medium parce sat fortiter punc- 

 tatis. Long. 'ti7. 



San Mateo, California, A. Agassiz. The elytra behind the middle are still 

 more destitute of lustre than the rest of the surface. The anterior coxae are 

 separated by the very narrow presternum. The antenna? are stout, scarcely 

 more than half the length of the body. 



97. Donacia californica, supra virescente-senea nitida, thorace quad- 

 rato, latitudine paulo breviore, lateribus rectis postice paulo convergentibus, 

 angulis omnibus prominulis, tuberculo antico male definito, postice transverse 

 fortiter, antice modice transversim impresso, dorso parum convexo, obsolete 

 punctulato et rugoso, canaliculato, ante medium transversim impresso, elytris 

 thorace duplo latioribus, planiusculis, apice subtruncatis, punctis inauratis 

 confertis striatis, interstitiis subtiliter rugosis, subtus plumbea. Long. -45. 



California, Mr. Murray. Resembles in form and characters D. p r o x i m a 

 Kirby, but differs by the color and by the thoracic tubercles being less promi- 

 nent. The upper surface is also not so smooth and shining. 



98. Coscinoptera vittigera, oblonga, subcylindrica, ameo nigra, cinereo- 

 pubescens, thorace latitudine vix breviore, antrorsum sensim angustato, sub- 

 tilius punctato, vitta dorsali ltevi. elytris confertim punctatis, vitta lata rufa a 

 basi ad apicem extensa ornatis, humeris obscuris. Long. "23. 



Bitter Root Vail. y, Mr. Pearsall. 



99. Pachybrachys anal is, oblongus, convexus niger, subopacus, cinereo- 

 pubescens, capite thoraceque confertim subtiliter punctatis, hoc vitta dorsali 

 ljevi, margine laterali testaceo, elytris punctatis subrugosis, hie inde substri- 

 atis, lateribus ante medium, apiceque testaceis ; pygidio flavo-bimaculato, 

 abdomine apice testaceo, pedibus nigro-flavoque variegatis. Long. '20. 



California, Mr. A. Murray. 



100. Pachybrachys viduatus Suffr. ; ( Crypto, bivittatus Say). A singular 

 variety of this species from California was sent me by Mr. Murray. The middle 

 and posterior spots are united with the vitta, so that the elytra are pale, with 

 the suture and narrow lateral and apical margin, a small humeral spot, and a 

 very broad stripe extending nearly to the tip black. 



101. Chrysomela (Phsedon) ov if or mis, ovalis convexa, supra aenea; cu- 

 preo-micans, thorace lateribus distincte, medio fere obsolete punctato, elytris 

 punctis mediocribus striatim digestis, interstitiis parce obsolete punctulatis. 

 Long. -15. 



East of Fort Colville, Mr. Gibbs. Less rounded and more convex than our 



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